if c != nil {
				c.Close()
			}
		}
	}

	var primary, fallback dialResult

	// Start the main racer.
	primaryCtx, primaryCancel := context.WithCancel(ctx)
	defer primaryCancel()
	go startRacer(primaryCtx, true)

	// Start the timer for the fallback racer.
	fallbackTimer := time.NewTimer(sd.fallbackDelay())
	defer fallbackTimer.Stop()

	for {
		select {
		case <-fallbackTimer.C:

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build race

package runtime

import (
	"internal/abi"
	"unsafe"
)

// Public race detection API, present iff build with -race.

func RaceRead(addr unsafe.Pointer)
func RaceWrite(addr unsafe.Pointer)
func RaceReadRange(addr unsafe.Pointer, len int)

<h2 id="restrictions">Implementation Restrictions for Programs Containing Data Races</h2>

<p>
The preceding section gave a formal definition of data-race-free program execution.
This section informally describes the semantics that implementations must provide
for programs that do contain races.
</p>

<p>
Any implementation can, upon detecting a data race,
report the race and halt execution of the program.

the GOMAXPROCS limit. This package's [GOMAXPROCS] function queries and changes
the limit.

The GORACE variable configures the race detector, for programs built using -race.
See the [Race Detector article] for details.

The GOTRACEBACK variable controls the amount of output generated when a Go
program fails due to an unrecovered panic or an unexpected runtime condition.

		done <- true
	}()
	x = <-c2 // ... write to x here
	<-done
}

func TestNoRaceChanReadWriteAsync(t *testing.T) {
	done := make(chan bool)
	c1 := make(chan int, 10)
	x := 0
	go func() {
		c1 <- x // read of x does not race with...
		done <- true
	}()
	x = <-c1 // ... write to x here
	<-done
}

func TestNoRaceProducerConsumerUnbuffered(t *testing.T) {
	type Task struct {

	// reported here (after m.Run but before the process exits), it will print
	// "PASS", then print the stack traces for the race, then exit with nonzero
	// status.
	//
	// This is a somewhat fundamental race: because the race detector hooks into
	// the runtime at a very low level, no matter where we put the printing it
	// would be possible to report a race that occurs afterward. However, we could

	}
	tracer := tracerProvider.Tracer(instrumentationScope)
	im := &realImageGCManager{
		runtime:       runtime,
		policy:        policy,
		imageRecords:  make(map[string]*imageRecord),
		statsProvider: statsProvider,
		recorder:      recorder,
		nodeRef:       nodeRef,
		tracer:        tracer,
	}

	return im, nil
}

}

func TestRacyOutput(t *T) {
	var runs int32  // The number of running Writes
	var races int32 // Incremented for each race detected
	raceDetector := func(b []byte) (int, error) {
		// Check if some other goroutine is concurrently calling Write.
		if atomic.LoadInt32(&runs) > 0 {
			atomic.AddInt32(&races, 1) // Race detected!
		}
		atomic.AddInt32(&runs, 1)
		defer atomic.AddInt32(&runs, -1)

	cmd := exec.Command(testenv.GoToolPath(t), "test", "-cover", "-race")
	cmd.Dir = filepath.Join("testdata", "issue56006")
	b, err := cmd.CombinedOutput()
	if err != nil {
		t.Fatalf("go test -cover -race failed: %v\n%s", err, b)
	}

	// Don't want to see any data races in output.
	avoid := []string{"DATA RACE"}
	for _, no := range avoid {
		if strings.Contains(string(b), no) {

// Go execution tracer.
// The tracer captures a wide range of execution events like goroutine
// creation/blocking/unblocking, syscall enter/exit/block, GC-related events,
// changes of heap size, processor start/stop, etc and writes them to a buffer
// in a compact form. A precise nanosecond-precision timestamp and a stack
// trace is captured for most events.
//
// Tracer invariants (to keep the synchronization making sense):